Profile: Hot King Instruments Company is a manufacturer of a wide assortment of Deep Freezer, Incubator Machine, High Pressure Autoclave, Constant Temp Bath, and Industrial Fermenter. Heat treatment furnace is an industrial appliance that generates temperatures of up to 1200°c. It is used for hardening or softening metals, glasses and chemicals. Muffle furnace which is also called as retort furnace. Glass, plastic and ceramic manufacturing industries can fuse various gases, solder, harden glasses and sterilize chemicals at high temperature using muffle furnace.